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2012, January 12, 20:42: Linus Torvalds merges Andrew's "patch-bomb" with the first CRIU kernel patches including the comment "... a project by various mad Russians to perform c/r mainly from userspace".

Now, five years later, Docker decided to integrate this project for checkpointing their containers. A valid reason for us to check out if this can also be good stuff for the Mainframe. After looking at the code at least one thing is clear now - it is ... crazy.

In this presentation we explain the deep technical details of checkpointing Linux processes in userspace including the Mainframe specific parts. We also show how CRIU can be used for Docker container checkpoints and for other promising scenarios.

Michael Holzheu is a Linux kernel developer at the IBM lab in Boeblingen, Germany. He studied computer science at the University of Erlangen and has worked for IBM since 1998. After a start in the z/OS UNIX Systems Services environment, he joined the Linux on z Systems team in 2000... Read More →